The role of root‐associated microbes in growth stimulation of plants under saline conditions

Abstract

Soil salinization has adverse effects on plant growth due to direct ion toxicity or secondary damage, such as mineral nutrition imbalance and the water stress caused by low osmotic potential. The rhizosphere processes of plants are likely to play an important role in the biological improvement of saline soil. However, the understanding of this remains limited. This review summarizes the progress made recently in exploring the

Enhancing quinoa growth under severe saline-alkali stress by phosphate solubilizing microorganism Penicillium funicuiosum P1

“…Many saline-alkali resistance microorganisms [ 23 ] not only reduced soil salinity [ 24 ], but also had the functions of nitrogen fixation [ 25 , 26 ], potassium [ 27 ] and phosphate solubilization [ 10 , 28 ]. Because of their functions, these microorganisms have great application potential on improving the nutrition of saline-alkali soil.…”

“…Because of their functions, these microorganisms have great application potential on improving the nutrition of saline-alkali soil. Thus, these microorganisms may be used to improve saline-alkali soil [ 10 , 23 , 24 ]. Moreover, many microorganisms secrete bioactive substances such as IAA [ 28 – 30 ], ACC deaminase [ 31 , 32 ], gibberellin [ 30 ], exopolysaccharides [ 33 , 34 ] and polyamine [ 35 ] etc., which activate the antioxidant system of plants and promote plant growth.…”

Improving Wheat Salt Tolerance for Saline Agriculture

“…Recently, studies showed that seed treatment with T. longibrachiatum T6 promoted seed germination and increased the shoot and root weights of wheat under salt-stress conditions . Beneficial soil microorganisms have demonstrated extensive potential for crop improvement under saline conditions . Besides, they can also promote the growth of wheat under nonsaline conditions. − Application of T. longibrachiatum T6 can lead to changes of some indicators related to improving salt tolerance in wheat under nonsaline conditions, including the increase of the content of chlorophyll, proline, ascorbate, glutathione, reducing the content of malondialdehyde (MDA), and promoting the expression of antioxidant enzyme genes ( SOD , POD , and CAT ). , However, it needs to be verified whether this promoting effect of T. longibrachiatum T6 on salt tolerance is direct or indirect.…”

Biochar enhanced phytostabilization of heavy metal contaminated mine tailings: A review

“…Phytoremediation efficiency is strongly dependent on the nature of root secretions, because root secretions, including hydrogen ions, organic acid anions, phytochelators, enzymes, and carboncontaining metabolites, which can promote complex formation and reduce heavy metal toxicity through chelation or hydrogen bonding (Yang et al, 2020). These roots secretions also attract beneficial rhizosphere growth-promoting bacteria, which facilitate plant growth under stress (Liu et al, 2021).…”